Table 2.

Descriptive statistics of PTSD symptoms and working alliance (N = 230).

Assessment	Measure	M (SD)	n
Initial	PDS	33.78 (9.66)	230
After session 1	PDS	30.10 (11.22)	210
	${\text{WAI}}_{\text{Patient}{\text{s}}^{\text{′}}\text{rating}}$	70.89 (11.28)	152
	${\text{WAI}}_{\text{Therapist}{\text{s}}^{\text{′}}\text{rating}}$	65.06 (11.21)	179
After session 3	PDS	26.40 (12.20)	193
	${\text{WAI}}_{\text{Patient}{\text{s}}^{\text{′}}\text{rating}}$	73.62 (9.01)	130
	${\text{WAI}}_{\text{Therapist}{\text{s}}^{\text{′}}\text{rating}}$	67.06 (12.25)	150
After session 5	PDS	21.52 (12.73)	179
	${\text{WAI}}_{\text{Patient}{\text{s}}^{\text{′}}\text{rating}}$	75.12 (9.68)	105
	${\text{WAI}}_{\text{Therapist}{\text{s}}^{\text{′}}\text{rating}}$	68.88 (11.21)	132
Final session	PDS	15.60 (14.12)	230

Sum scores for all measures are reported; 17 PDS items rated on a 4-point Likert scale ranging from 0 to 3; 12 WAI items rated on a 7-point Likert Scale ranging from 1 to 7; n = number of available responses for each variable.